Macao Post has defined the following guiding principles for its policy of Philatelic issues: Thematic Diversity, Credibility and Responsibility, and Product Quality. Macao Post published six Philatelic Catalogues with details of all products issued since the establishment of Macao Special Administrative Region (MSAR). Macao Post, responding to users' concerns when doing transactions on the Internet, introduced, through the eSignTrust services, the Qualified Electronic Signature, which follows international security standards. This signature, using a secure device and complying with internationally recognized norms, has its Integrity, Confidentiality and Non-Repudiation guaranteed. It is recommended for accessing online services provided by Banks, Private Companies and the Government. Macao Post is committed to promoting and continuously improving the interoperability, quality and efficiency of the Physical, Electronic and Financial Postal Networks all over the world.